4390720 has 28 divisors (see below), whose sum is σ = 10456164. Its totient is φ = 1756160.

The previous prime is 4390717. The next prime is 4390733. The reversal of 4390720 is 270934.

It can be written as a sum of positive squares in 2 ways, for example, as 1236544 + 3154176 = 1112^2 + 1776^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6541 + ... + 7180.

Almost surely, 2^4390720 is an apocalyptic number.

4390720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4390720 is an abundant number, since it is smaller than the sum of its proper divisors (6065444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4390720 is a wasteful number, since it uses less digits than its factorization.

4390720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13738 (or 13728 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 4390720 is about 2095.4044955569. The cubic root of 4390720 is about 163.7489714987.

The spelling of 4390720 in words is "four million, three hundred ninety thousand, seven hundred twenty".